CA-FAVER2 can export files in compressed format. When CA-FAVER encounters a compressed file, it is handled as follows:
All five Extend/DASD/VSE compression methods are supported. The data records are decompressed by GVRESTOR and are written using logical VSAM or QSAM data management macros. This allows CA-Extend/DASD/MVS or SMS to compress the file as it is being restored.
This type of compression cannot be supported. The Dictionary Building Blocks (DBB) used by MVS system compression are different than those used in VSE. A GV805 error message will be issued, and the reload will be failed. Since IBM occasionally applies maintenance to the DBBs themselves, IBM recommends that files not be exported in compressed format because DBB maintenance will render the compressed file unusable.
Note: If CA FAVER for VSE was used to export a VSAM file compressed by CA-Extend/DASD for VSE, the decompression is not automatic. The XTNDCHK parameter must be included on the RESTORE command to activate this support.
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